Final answer:
An amorphous metal has no crystal structure at room temperature, with a randomly organized internal structure and no precise melting point.
Step-by-step explanation:
Among the choices provided regarding the nature of an amorphous metal, the true statement is that an amorphous metal has no crystal structure at room temperature. Unlike crystalline solids, which have atoms or molecules placed in an ordered and repeating pattern, amorphous metals have a randomly organized internal structure.
As a result, they do not exhibit a sharp melting point but rather soften over a range of temperatures. Contrary to having a well-defined crystalline lattice, the structure of amorphous solids lacks long-range order. This is significant because the properties of a material, such as electrical conductivity and melting temperature, can be dramatically affected by whether it is amorphous or crystalline.